A portable signal generating device that, when activated, emits a visual or audible signal in coordination with other compatible devices in the vicinity that it can detect, and with which it can synchronize to create a coordinated signal effect.
A portable signal generating apparatus that, when activated, emits a visual or audible signal in coordination with other compatible apparatus in the vicinity that it can detect, and with which it can synchronize to create a coordinated signal effect.
A portable information system that, when activated, presents certain data to a user, wherein the information is prepositioned within the portable system or provided to it. The information may be resident within fixed memory, added by means of a smart card, or wirelessly transmitted to the information system. The information conveyed to the user may be visual, such as a text screen or a video display as well as audible such as a play by play broadcast. The information may include local areas of interest or locations within the venue in which the apparatus is used.
There is provided a cable which retards lightning. The cable includes at least one internal conductor which may be a power conductor or a signal conductor. A choke conductor is wound about the internal conductor in the shape of a spiral. If lightning strikes near the cable or a device which is attached to the cable, such as an antenna, the choke conductor presents a high impedance to the current caused by lightning and will prevent the lightning current from flowing down the choke conductor, thus entering the internal conductor, thereby preventing damage to the internal conductor and any associated electronic equipment. Preferably, a shield is also spiraled wound about the internal conductor adjacent to the choke conductor in a direction opposite to the choke conductor, whereby the angle formed by the crossing of the choke conductor and the shield is approximately 90. degree. to block the magnetic field component of the lightning discharge.
There is provided a cable which retards lightning. The cable includes at least one internal conductor which may be a power conductor or a signal conductor. A choke conductor is wound about the internal conductor in the shape of a spiral. If lightning strikes near the cable or a device which is attached to the cable, such as an antenna, the choke conductor presents a high impedance to the current caused by lightning and will prevent the lightning current from flowing down the choke conductor, thus entering the internal conductor, thereby preventing damage to the internal conductor and any associated electronic equipment. Preferably, a shield is also spiraled wound about the internal conductor adjacent to the choke conductor in a direction opposite to the choke conductor, whereby the angle formed by the crossing of the choke conductor and the shield is approximately 90. degree. to block the magnetic field component of the lightning discharge.
A roof mount for securely attaching dish antennae to roofs of houses typically supported by a plurality of spaced rafters has a two piece frame attached to a selected portion of a roof with one piece on top of the roof supporting the dish and its adjusting mechanism and the other piece of the frame underlying the first frame beneath the roof. A plurality of fasteners penetrate the roof and both frames and draw the frames toward each other to clamp them about the selected portion of the roof and provide steady support for the antenna.
There is provided a cable which retards lightning. The cable includes at least one internal conductor which may be a power conductor or a signal conductor. A choke conductor is wound about the internal conductor in the shape of a spiral. If lightning strikes near the cable or a device which is attached to the cable, such as an antenna, the choke conductor presents a high impedance to the current caused by lightning and will prevent the lightning current from flowing down the choke conductor, thus entering the internal conductor, thereby preventing damage to the internal conductor and any associated electronic equipment. Preferably, a shield is also wound about the internal conductor adjacent to the choke conductor in a direction opposite to the choke conductor, whereby the angle formed by the crossing of the choke conductor and the shield is approximately 90. degree. to block the magnetic field component of the lightning discharge. The choke conductor and the shield may be wound about a conduit which houses the cable.
A cable assembly has a cable of conductor assemblies within an insulating envelope, a conducting shield disposed around the cable, a grounding wire outside the shield extending along the length of the shield and in continuous contact with the shield, and an insulating and weatherproof jacket enclosing the shield and the grounding wire. A method for using the cable assembly to connect a satellite television antenna to a receiver in a remote building, providing protection from ground induced lightning, is also disclosed.
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